Perform the operation

(10^2-x+1)-(9x-2)

Me ! write an equation for the interior angles of this triangle that uses the triangle sum theorem

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!